Materials Literature
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A saddle-distorted dodecaphenylporphyrin undergoes protonation followed by two-electron reduction by SnCl(2) to give a roof-shaped dodecaphenylporphodimethene which exhibits reversible one-electron reduction and oxidation behaviour in benzonitrile to allow us to observe an ESR spectrum of pi-cation radical in the cour…
A simple assay to probe disease-associated enzyme activity using glycosaminoglycan-assisted synthesized gold nanoparticles is reported.
The structural changes of polycrystalline DyNiO3 perovskite across the metal-insulator transition (TMI = 564 K) have been studied by high resolution neutron diffraction techniques together with Mössbauer spectroscopy, in a sample doped with 1.5 at.% 57Fe. In the insulating (semi-conducting) regime, below T(MI), the pe…
BACKGROUND: A wide variety of stabilizing factors have been invoked so far to elucidate the structural basis of protein thermostability. These include, amongst the others, a higher number of ion-pairs interactions and hydrogen bonds, together with a better packing of hydrophobic residues. It has been frequently observ…
Twenty-six new acylated-oxypregnane glycosides were obtained along with three known cardenolide glycosides from the roots of Asclepias curassavica (Asclepiadaceae). The new compounds were confirmed to contain 12-O-benzoylsarcostin, 12-O-benzoyldeacylmetaplexigenin, kidjolanin, and 12-O-benzoyltayloron, and one new acy…
The pro rata addition of 0-20 wt% Fe2O3 to a UK high level waste (HLW) borosilicate glass containing 25 wt% model UK HLW has been studied in terms of the effects of Fe2O3 addition on glass chemical durability, thermal properties, density and redox. Mixtures have been successfully melted in Pt crucibles at 1050 and 115…
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We present here the results of frequency dependent dielectric, polarization, and powder x-ray powder diffraction studies in the 300–100K temperature range for Ba0.55Sr0.45TiO3. The dielectric results indicate a succession of three relaxor ferroelectric transitions accompanying the cubic to tetragonal to orthorhombic t…
The electronic structures of pure and Mn-doped wurtzite ZnO have been calculated by first-principles ultra-soft pseudo-potential approach of the plane wave based upon the density functional theory, and the structure change, bandstructure, density of state and the difference charge density were studied. The calculated…
I discuss invariance conditions arising in a model of finite strain gradient plasticity including phenomenologi-cal Prager type linear kinematical hardening and nonlocal kinematical hardening due to dislocation interaction. Based on the multiplicative decomposition a flow rule for Fp is assumed which can be derived by…
The effect of monoethanol amine (MEA) as neutralizing and a corrosion inhibitor (IC) on carbon steel corrosion process in typical environments of petroleum refining distillation plants was evaluated using electrochemical impedance spectroscopy (EIS). The EIS analysis showed that the carbon steel corrosion process in H…
Temporal and spatial behavior of WO3 plasma plume in pulsed laser deposition process have been studied using emission spectroscopic method. Three dimensional study of the plasma plume suggested that the emission plasma plume grew toward substrate direction after the laser irradiation on the target to 2.0 11s, and they…
Today there are increasing levels of environmental pollution and there is evidence for the growing resistance of bacteria to traditional biocides. When these two factors are coupled to the rising cost of and concern about the possible overuse of biocides it is not surprising that there is active research underway to f…
[Objective] The research aimed to provide basis for the application of nano-materials in biological field.[Method] The changes of water clusters treated with nano-materials were studied through ultraviolet absorption spectrum and nuclear magnetic resonance spectroscopy.[Result] The light absorption of water treated wi…
A study has been undertaken to identify the source of coke fines sampled from the deadman area of the blast furnace. Using measurements of the coke crystallite dimension L C, it was established that some of the fines found in the deadman area of a blast furnace were not simply the degradation products of the lump coke…
We report the fabrication of the orientation preferred structures in BaTiO3 thin films on Ni substrates using pulsed laser deposition. Transmission electron microscopy studies showed that the films consist of crystalline structures of tetragonal BaTiO3. More than 60% of BaTiO3 grains in the films exhibit nearly the sa…
Semiconductor CdSe nanoparticles assemble into micrometer-sized spheres ranging from <1 to 50 μm when precipitated from hexane by methanol under conditions of stirring. Both solid and hollow spheres may be formed and the type of sphere can be controlled by the solvent concentration. In addition, stir rate and nanopart…
The bis-[trimethoxysilylpropyl]amine (BTSPA) film filled with copper phthalocyanine (Cu-Ph) was prepared by adding different concentrations of copper phthalocyanine - Cu-Ph and deposited on a carbon steel substrate using 120 ºC and 150 ºC as curing temperatures. For samples cured at 150 ºC a second layer was also depo…
Sol–gel derived inorganic–organic hybrid materials (HYBRIMERs) have shown a great potential for planar and channel waveguides due to their high photosensitivity, low-cost processing and good suitability for doping. These materials have been synthesized with a high content of titanium (40%) and with three different che…
We report the selective growth of α ‐Al 2 O 3 nanowires and nanobelts via a catalyst‐free chemical vapor deposition process under ambient pressure. By controlling the flow rates of the carrier gas, high‐yield production of uniform alumina nanowires with diameter distribution (100 nm–200 nm) was achieved at a high grow…